|1923 Ace XP-3 Experimental Motorcycle|
This Experimental Motorcycle(Ace XP-3 Experimental Motorcycle Replica of 1923) founded by William G. Henderson in 1920, the Ace Motor Corporation began manufacturing four-cylinder motorcycles that were styled after
's compelling Excelsior-Henderson Model F and Model G inline-fours. the goal was to build the fastest motorcycle in the world, and the first bikes produced by Ace were a series of five experimental four-cylinder engines known as XP1 through XP5. Henderson
|1923 Ace XP-4 Experimental Replica with Sidecar|
early 1923, Charles 'Red' Wolverton defected from Excelsior-Henderson to become Ace Motor Corp's chief test-rider. To aid in the tuning of their magnesium-cased engines, Ace was one of the first motorcycle manufacturers to use a brake dynamometer to extract every ounce of horsepower. According to Wolverton, their first engine blew up on the dynamometer, sending the magneto past his ear. The management at Ace was so confident in their new engines that they put up $50,000 to any other motorcycle manufacturer who could beat their bikes.
November 1923, Ace set two world speed records with their EXP-4 which reached 129.61mph, and their EXP-3 sidecar version which reached 106.8mph. The EXP-3 used a detuned version of the EXP-4 engine, with aluminum crankcases and a pressure-feed lubrication system.
In 1923 after the passing of William Henderson Arthur Lemon became the company president despite the legendary achievements of the company